Ranked in these QuestionsQuestion Ranking
Pro Contacts can be organized via tags
Pro Helps deal with duplicates across multiple accounts
Pro Accurate business card transcription
FullContact uses human transcription that allows for near-perfect accuracy.
Pro Great integration with Google's services
FullContact pulls information about contacts from social networks to give an overview of the person right from within Gmail. It shows information about meeting attendees in Google Calendar. It supplements Google Contacts by adding additional information to entries.
Pro Allows leaving notes for each user
Pro Keeps information about contacts up to date
Free version synchronizes contact information daily while the premium version allows real-time sync.